/Engine/Plugins/Developer/Concert/ConcertMain/Source/ConcertServer/Public/IConcertServer.h
Rename a live or archived Concert session on the server. The server automatically detects if the specified session Id is a live or an archived session.
True if the session was renamed.
bool RenameSession ( const [FGuid](API\Runtime\Core\Misc\FGuid) & SessionId, const [FString](API\Runtime\Core\Containers\FString) & NewName, [FText](API\Runtime\Core\Internationalization\FText) & OutFailureReason )